US 12,345,217 B2
Ramjet propulsion method
Mark Bovankovich, Orlando, FL (US)
Filed by Judith Marie Bovankovich, Orlando, FL (US)
Filed on Apr. 12, 2024, as Appl. No. 18/634,822.
Application 18/634,822 is a division of application No. 16/209,466, filed on Dec. 4, 2018, granted, now 11,976,612.
Application 16/209,466 is a division of application No. 14/069,454, filed on Nov. 1, 2013, abandoned.
Claims priority of provisional application 61/723,906, filed on Nov. 8, 2012.
Prior Publication US 2024/0301844 A1, Sep. 12, 2024
Int. Cl. F02K 7/10 (2006.01); B64D 39/00 (2006.01); B64G 1/00 (2006.01); F02C 7/22 (2006.01); F02K 1/09 (2006.01); F02K 7/16 (2006.01); F02K 7/18 (2006.01)
CPC F02K 7/10 (2013.01) [B64D 39/00 (2013.01); B64G 1/002 (2013.01); B64G 1/005 (2013.01); F02C 7/22 (2013.01); F02K 1/09 (2013.01); F02K 7/16 (2013.01); F02K 7/18 (2013.01); F05D 2220/80 (2013.01); Y02T 50/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
an airplane configured for horizontal takeoff and to accelerate to a speed of at least 1.5 Mach;
a high-speed launch ramjet boost (HSLRB) stage coupled to the airplane, the HSLRB stage configured to separate from the airplane; and
a rocket-powered stage coupled to the HSLRB stage; and
at least one controller configured to:
ignite the HSLRB stage after the airplane has reached the speed of at least 1.5 Mach and
launch the rocket-powered stage from the HSLRB stage at a predetermined speed of the HSLRB stage below 6.0 Mach.